The study was conducted to examine the effect of composite feed additive on fluctuations in weekly milk production and milk composition in lactating buffaloes. The experiment was carried out in buffalo farm ICAR-CIRB Hisar. Murrah lactating buffaloes (n=18) (Bubalus bubalis) (avg. milk yield 10.83± 1.56 kg) and (avg. live weight, 507.24 ± 44.18 kg; parity, 2-5) at early stage (30 days) of lactation were selected and divided into two groups of 8 animals each using a completely randomized block design. They were allocated into two dietary groups, control and treatment containing basal feed without or with composite feed additives, respectively. Composite feed additive (CFA) was fed @ 2.5% of total dry matter intake in the CFA fed group along with concentrate mixture. Initial milk yield of control and treatment group was 10.78 ± 1.86 and 10.87 ± 1.31 respectively which were comparable between the both groups (p>0.05). The initial milk protein%, milk fat%, lactose% and SNF% were 4.26±0.32 and 4.25±0.25, 6.67±0.73 and 6.86±0.73, 4.51±0.23 and 4.52±0.22, 9.31±0.31 and 9.32±0.16 in control and treatment group. Initial milk yield (kg d-1) of both the groups were similar (p>0.05). Although there are differences in milk yield (kg d-1) throughout the study, it was comparable (p>0.05) statistically between control and treatment groups. The weekly milk composition in term of fat (%), solid-not-fat (SNF %), protein (%) and lactose (%) showed no apparent variations (p>0.05) between the groups.